January Weather in Littleton, United States

Last updated: June 24, 2025

In January, the average temperature in Littleton, United States hovers around -3°C (27°F). During this time, you can experience a minimum chill of -24°C (-11°F) and a surprisingly warm maximum of 18°C (64°F). Expect about 23 mm (0.9 in) of precipitation spread over 4 days, complemented by a high average humidity of 88%.

January Temperature in Littleton

In January in Littleton, the average temperature is -3°C (27°F), with a maximum that can reach 18°C (64°F) and a minimum that can drop as low as -24°C (-11°F). Travelers should prepare for a wide range of temperatures and pack accordingly to enjoy their time in Littleton.

January Weather in Littleton: Daily Temperature Highs, Lows, and Averages

The chart illustrates January temperature patterns in Littleton, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Littleton, January typically has an average temperature of -3°C (27°F), with highs reaching up to 18°C (64°F) and lows dropping to around -24°C (-11°F).

Data source: Temperature data for Littleton generated using information from the Copernicus Climate Change Service.

January Precipitation in Littleton

In Littleton in January, the total precipitation amount is 23 mm (0.9 in) over a span of 4 days.

January Precipitation Trends in Littleton

The chart displays monthly precipitation patterns in Littleton, with values for each month alongside January’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how January’s conditions compare to those of other months. In Littleton, January typically receives around 23 mm (0.9 inches) of precipitation spread over approximately 4 days.

Data source: Precipitation data for January generated using information from the Copernicus Climate Change Service.

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Millimeters (mm) Inches (in)

January Humidity in Littleton

In Littleton in January humidity is 88%. With an average temperature of -3°C (27°F), this humidity feels like a biting chill that seeps into your bones, making outdoor exploration less inviting as the dampness clings to your clothing and slows your movements.

January Average Humidity in Littleton

This chart illustrates the average monthly humidity levels in Littleton, with January’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In January, average humidity in Littleton is approximately 88%, offering insight into how humid the weather typically is during this month.

Data source: Humidity data for January generated using information from the Copernicus Climate Change Service.

January UV Index in Littleton

In Littleton in January, the maximum UV index reaches 4, which corresponds to a moderate Exposure Category. With a time to burn of 30 minutes, it’s important to take precautions to protect your skin. You can find more details in the Hourly UV Index in Littleton for better planning.

Maximum UV Index Levels in Littleton for January

The chart shows the monthly maximum UV Index (UVI) for Littleton in January, representing the highest UV radiation level. The UVI measures the intensity of ultraviolet radiation from the sun, indicating the potential risk of sunburn and UV-related health issues. In January, the maximum UV index in Littleton typically reaches 4, which falls under the moderate exposure category.

Data source: Littleton January UVI data generated using information from the Copernicus Climate Change Service.

UV Risk Categories

Extreme (11+): Avoid the sun, stay in shade.
Very High (8-10): Limit sun exposure.
High (6-7): Use SPF 30+ and protective clothing.
Moderate (3-5): Midday shade recommended.
Low (0-2): No protection needed.

How January Weather in Littleton Compares to Other Months

Weather in Littleton varies notably across the year, with each month offering distinct climate conditions. This page compares January’s weather to other months in Littleton, focusing on differences in temperature, rainfall, humidity, and UV levels.

This table compares monthly weather conditions in Littleton, showing how January’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	-3°C (27°F)	23 mm (0.9 inches)	88%	moderate
February Weather	-3°C (27°F)	28 mm (1.1 inches)	87%	high
March Weather	2°C (37°F)	64 mm (2.5 inches)	81%	very high
April Weather	6°C (44°F)	57 mm (2.2 inches)	76%	extreme
May Weather	11°C (53°F)	118 mm (4.6 inches)	66%	extreme
June Weather	19°C (66°F)	56 mm (2.2 inches)	58%	extreme
July Weather	21°C (71°F)	57 mm (2.2 inches)	52%	extreme
August Weather	21°C (69°F)	37 mm (1.4 inches)	56%	extreme
September Weather	17°C (64°F)	36 mm (1.4 inches)	65%	very high
October Weather	8°C (47°F)	38 mm (1.5 inches)	76%	high
November Weather	3°C (38°F)	23 mm (0.9 inches)	82%	moderate
December Weather	-1°C (31°F)	14 mm (0.6 inches)	89%	moderate